Search results

This paper aims to present an improvement to the power quality of the grid by using a colliding body optimization (CBO) based proportional-integral (PI) compensated design for a grid-connected solar photovoltaic-fed brushless DC motor (BLDC)-driven water pumping system with a bidirectional power flow control. The system with bidirectional power flow allows driving the pump at full proportions uninterruptedly irrespective of the weather conditions and feeding a grid when water pumping is not required.

Here, power quality issue is taken care of by the optimal generation of the duty cycle of the voltage source converter. The duty cycle is optimally generated by optimal selection of the gains of the current controller (i.e. PI), with the CBO technique resulting in a nearly unity power factor as well as lower total harmonic distortion (THD) of input current. In the CBO technique, the gains of the PI controller are considered as agents and collide with each other to obtain the best value. The system is simulated using MATLAB/Simulink and validated in real time with OPAL RT simulator, OP5700.

It was found that the power quality of grid using the CBO technique has improved much better than the particle swarm optimization and Zeigler–Nichols approach. The bidirectional flow of control of VSC allowed for optimum resource utilization and full capacity of water pumping whatever may be weather conditions.

Improved power quality of grid by optimally generation of the duty cycle for the proposed system. A unit vector tamplate generation technique is used for bidirectional power transfer.

The paper seeks to examine the presence of coercion in the common use of reverse auctions for industrial procurement and spend management activities, and to illustrate the many problems that arise when purchasing and supply management is viewed by powerful buying organizations as a simple dyadic relationship with sellers.

The paper takes the form of a literature review, and analysis of the meaning of coercion, and supplier survey data.

Reverse auctions, as commonly used, are shown to be fundamentally coercive, with coercion being essential for achieving the outcomes that buyers seek.

Survey responses and findings that can be drawn from them are limited due to the small sample size. Reflects the dyadic nature of buyers' corporate codes of conduct in relation to the day‐to‐day practice of purchasing and supply management.

The existence of coercion indicates that reverse auctions are inconsistent with corporate codes of ethics or codes of conduct with respect to supplier relationships (e.g. fairness, honesty, and integrity). Reverse auctions are also shown to be inconsistent with US federal procurement standards and the Institute of Supply Management's “Principles and standards of ethical supply management conduct”.

The paper brings to the forefront the existence of psychological and economic coercion in the common use of reverse auctions, and discusses how this creates difficult problems for both buyers and sellers. It also presents alternative strategies that managers in buying and selling organizations can use instead of reverse auctions.

This paper aims to understand household’s latent behaviour decision-making in accessing financial services. In this analysis, the determinants of the choice of the pre-entry Mzansi account by consumers in South Africa is looked at.

In this study, 102 variables, grouped in the following categories: basic literacy, understanding financial terms, targets for financial advice, desired financial education and financial perception. Using a computationally efficient variable selection algorithm, variables that can satisfactorily explain the choice of a Mzansi account were studied.

The Mzansi intervention is appealing to individuals with basic but insufficient financial education. Aspirations seem to be very influential in revealing the choice of financial services, and, to this end, Mzansi is perceived as a pre-entry account not meeting the aspirations of individuals aiming to climb up the financial services ladder. It was found that Mzansi holders view the account mainly as a vehicle for receiving payments, but, on the other hand, are debt-averse and inclined to save. Hence, although there is at present no concrete evidence that the Mzansi intervention increases access to finance via diversification (i.e. by recruiting customers into higher-level accounts and services), this analysis shows that this is very likely to be the case.

The issue of demand-side constraints on access to finance have been largely been ignored in the theoretical and empirical literature. This paper undertakes some preliminary steps in addressing this gap.

Gary Parr, deputy chairman of Lazard Freres & Co. and Kellogg class of 1980, could not believe his ears. “You can't mean that,” he said, reacting to the lowered bid given by Doug Braunstein, JP Morgan head of investment banking, for Parr's client, legendary investment bank Bear Stearns. Less than eighteen months after trading at an all-time high of $172.61 a share, Bear now had little choice but to accept Morgan's humiliating $2-per-share, Federal Reserve-sanctioned bailout offer. “I'll have to get back to you.” Hanging up the phone, Parr leaned back and gave an exhausted sigh. Rumors had swirled around Bear ever since two of its hedge funds imploded as a result of the subprime housing crisis, but time and again, the scrappy Bear appeared to have weathered the storm. Parr's efforts to find a capital infusion for the bank had resulted in lengthy discussions and marathon due diligence sessions, but one after another, potential investors had backed away, scared off in part by Bear's sizable mortgage holdings at a time when every bank on Wall Street was reducing its positions and taking massive write-downs in the asset class. In the past week, those rumors had reached a fever pitch, with financial analysts openly questioning Bear's ability to continue operations and its clients running for the exits. Now Sunday afternoon, it had already been a long weekend, and it would almost certainly be a long night, as the Fed-backed bailout of Bear would require onerous negotiations before Monday's market open. By morning, the eighty-five-year-old investment bank, which had survived the Great Depression, the savings and loan crisis, and the dot-com implosion, would cease to exist as an independent firm. Pausing briefly before calling CEO Alan Schwartz and the rest of Bear's board, Parr allowed himself a moment of reflection. How had it all happened?

An analysis of the fall of Bear Stearns facilitates an understanding of the difficulties affecting the entire investment banking industry: high leverage, overreliance on short-term financing, excessive risk taking on proprietary trading and asset management desks, and myopic senior management all contributed to the massive losses and loss of confidence. The impact on the global economy was of epic proportions.

This paper aims to examine the reading of a book-length fiction or non-fiction text in one disciplinary literacy (DL) teacher education course. This paper considers how the assignment may help pre- and in-service teachers understand literacy as multifaceted and connected within and beyond their content areas (Moje, 2015). The research explores how reading a book-length text may help support DL, equity-oriented curricula that consider literacy as empowerment and connected to lived and communal experiences (González et al., 2005; Muhammad, 2020).

This work is grounded in a qualitative, humanizing methodology and thematic analysis approach (Braun and Clarke, 2006; Paris and Winn, 2014). This approach examines student work in one DL course, considering how teachers within and beyond English language arts (ELA) respond to the task of reading a book-length text.

First, the assignment offered space for participants to redefine literacy as empowerment and enjoyment. Second, the assignment helped participants connect literacy within and beyond their content areas and to see literacy as active and interdisciplinary. Third, the assignment includes clear limitations for a DL approach, particularly when participants focus mainly on connections to their content area. This sometimes obfuscated participants’ enjoyment of reading.

The study offers a new perspective on a task that is often seen as specifically “ELA”: reading a book-length text. This project offers space for ELA educators to consider literacy from a DL, equity-oriented framework focused on enjoyment in literature within and beyond ELA classrooms.

Until recently little attention has been given in Accounting and Finance literature to the problem of linking the results of financial evaluation techniques such as Net Present Value (NPV) and Shareholder Value Analysis (SVA) to managers’ cognitive evaluation of strategic factors and the risk profile of projects. Various authors have called for research in this area, but very little has so far been published. This paper reports on a field‐based study carried out in the logistics industry. It builds on earlier research, which elicited constructs that managers use to assess project risk using a repertory grid technique. It provides an insight into how a project risk analysis process can be linked with project returns in strategic investment appraisal (SIA) in a divisionalised organisation. An action research approach was taken to develop a decision matrix to link the risk assessment results to expected project returns as an aid to management in strategic investment decision‐making. It is now embedded in the investment appraisal procedures across the European group of companies that participated in the research. It is suggested that the framework adopted in this experimental study is transferable to other organisational contexts.

Communications regarding this column should be addressed to Mrs. Cheney, Peabody Library School, Nashville, Tenn. 37203. Mrs. Cheney does not sell the books listed here. They are available through normal trade sources. Mrs. Cheney, being a member of the editorial board of Pierian Press, will not review Pierian Press reference books in this column. Descriptions of Pierian Press reference books will be included elsewhere in this publication.

This study aims to investigate the attainment of quality in Government of Ghana’s (GoG) infrastructural projects through effective contract management and especially, relating to qualification, competence and experience of supply chain stakeholders.

A survey questionnaire and field observations were used to collect primary data from staff of the education ministry and construction professionals. Documentary analyses of contract documents were also undertaken.

The results show that executing agencies’ failure to apply appropriate contract management processes was linked to the gap between stakeholders’ knowledge and actual practice. This was confirmed by Spearman’s rho tests of correlation between overall mean ranks given by professionals and non-professionals, which indicated strong agreement between those groups. Factors such as contractors’ engagement of unqualified supervisory staff, lack of proper projects monitoring and evaluation by executing agencies mainly contribute to the poor quality of work.

Investigations were limited to the Funds and Procurement Management Unit of the Ministry of Education, Metropolitan, Municipal and District Assemblies and local contractors. Nonetheless, the methodology used could be used in future studies to analyse the socio-economic implications on the quality of education infrastructure.

Construction is booming in Ghana but the capacity to improve the work quality through effective contract management is limited. However, with the effort of stakeholder and statutory bodies’ support in capacity building initiatives, GoG projects could offer some novel solutions to improve quality of work.

Construction industry professionals and students’ knowledge and perception on construction industry and contract management is significantly improved.

This study provides information on respondents’ knowledge on contract management process, which, if not properly understood, can lead to poor quality of work and loss of money.